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Mosquito Control Notification - April 22, 2025

Aerial map of targeted wetland areas in Dedham, MA shown in green (Spring 2025). Provided by the Norfolk County Mosquito Control District

Aerial Mosquito Control Application April 23 to 25

The Norfolk County Mosquito Control District (NCMCD) and its contracted helicopter company will be conducting aerial larvicide applications in the district beginning tomorrow, April 23, 2025 possibly through Friday, April 25, 2025 between the hours of 7:00 am and 7:30 pm daily (weather/wind permitting). 

The trade name of the granular formulation of Bti to be used is VectoBac GS (EPA Reg. #73049-10). Please note: The application is not a spray.

• About Larvicides: The NCMCD uses larvicide (to target immature mosquitoes) and adulticide (to target flying adults) products to control mosquito populations and vector-borne diseases such as West Nile virus and Eastern Equine Encephalitis. 
  •  The larvicide products used include Bacillus thuringiensis israelensis (Bti) and Bacillus sphaericus (Bs). Bti and Bs are naturally occurring organic microbes found in soil and offer the most environmentally friendly method of mosquito control as they are very effective against mosquitoes but have extremely few non-target effects.
  • Please visit the Norfolk County Mosquito Control site for more information about the products used.

Questions?

Please contact the Norfolk County Mosquito Control District by calling 781-762-3681 or view their interactive map indicating targeted wetlands by clicking on the red button below.

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Dedham Town Hall

450 Washington Street, Dedham, MA 02026
(781)751-9100

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